| spoil(verb, dull, decline, turn, weaken) |
| putrefy(verb, dull, decline, spoil, weaken) |
| decay(verb, stop, dull, end, pass) |
| decompose(verb, dull, decline, spoil, weaken) |
| turn(verb, decline, spoil, weaken, lessen) |
| go off(verb, expression, phrasal verb, turn, spoil) |
| disintegrate(verb, dull, decline, spoil, weaken) |
| fail(verb, stop, end, decline, pass) |
| deteriorate(verb, stop, end, decline, pass) |
| break down(verb, expression, phrasal verb, stop, dull) |
| curdle(verb, dull, decline, turn, spoil) |
| mildew(verb, decline, weaken, lessen, degenerate) |
| molder(verb, stop, dull, end, decline) |
| break up(verb, expression, phrasal verb, decline, weaken) |
| crumble(verb, stop, dull, end, decline) |
| fester(verb, stain, decay, decompose) |
| mold(verb, decline, weaken, lessen, degenerate) |
| mortify(verb, decline, weaken, lessen, degenerate) |
| sink(verb, stop, end, decline, pass) |
| suppurate(verb, decline, weaken, lessen, degenerate) |